Express cos6mcos2m as a sum or difference.
(1/2)cos4 m - (1/2)cos8 m
(1/2)cos8 m - (1/2)cos4...
Mathematics, 16.04.2021 18:00 roger93
Express cos6mcos2m as a sum or difference.
(1/2)cos4 m - (1/2)cos8 m
(1/2)cos8 m - (1/2)cos4 m
(1/2)cos4 m + (1/2)cos8 m
(1/2)cos4 m + (1/2)cos2 m
Answers: 2
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X+y=-4 x-y=2 use elimination with adding and subtraction
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